There seem to be a growing number of quite arty internet based games out there (ie. games you can play by just going to websites without having to download anything). Some are pretentious. Some are pretentious and rubbish. Some are card company cute. Some are political. Some are queer (click the headline on the page). But this strangely beautiful game is the pick of the crop. You need to have the sound on for it and to take a look at this to understand what the hell is going on. Basically, you run your mouse over the screen, find spots where it turns into a pointy hand and click them to see what happens. You have to work out what combination of clicks will get you off the screen and onto the next one. It is only few screens long and is really quite easy (especially with the hint site).
Alternatively, you could opt for a not particularly arty but fiendishly addictive mining game or have a snowball fight or a game of table tennis. Perhaps you just want to sit back and watch a (quite violent) animation.